I'm sure they will sound better with stationary amps, but they were sold as mobile phones, a more portable version of the planar technology. My Headstage Arrow, in my opinion a good, ultraportable miniamp, is enough to move them and give me the dynamic sound i can't find just straight of my Cowon Plenue D, but doesn't open so much the soundstage, i still find it narrow (not expecting an open back performance, obviously). Maybe a Mojo or something like that could solve it, but well, i think that the fact we were commenting is that straight out of the fabric, even connected to a good mid-fi dap (ibasso dx90) , with not top of the line sources, in normal "on the go" situations, the soundstage feels narrow for some people. However there are lots of ears and tastes out there, i would love to hear them with that Schiit...